Methods for separating hydrocarbon gases
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United States of America Patent
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Feb 28, 2017
Grant Date -
Nov 20, 2014
app pub date -
May 15, 2013
filing date -
May 15, 2013
priority date (Note) -
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Abstract
The present invention relates to a process for separating a hydrocarbon gas into a fraction containing a predominant portion of the methane or ethane and lighter components and a fraction containing a predominant portion of the C2 or C3 and heavier components in which process the feed gas is treated in one or more heat exchange, and expansion steps; partly condensed feed gas is directed into a separator wherein a first residue vapor is separated from a C2 or C3-containing liquid; and C2 or C3-containing liquids, at substantially the pressure of separation, are directed into a distillation column wherein said liquid is separated into a second residue is separated to recover a C2 or C3-containing product. The foregoing process is improved by cooling said second residue to partially condense it.
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